Key Clinical MessageDens evaginatus is an uncommon dental anomaly presenting on mandibular premolar teeth. Affected teeth are difficult to diagnose and manage, and often demonstrate immature apices requiring complex endodontic treatment approaches.AbstractDens evaginatus (DE) is an uncommon anomaly affecting mandibular premolars, frequently requiring endodontic intervention. This report documents the treatment of an immature mandibular premolar presenting with DE. Early diagnosis and preventive strategies remain the preferred management for these anomalies, however endodontic approaches may be successfully applied to retain these teeth.